Echo CS-550P Instruction Manual - page 30
28
CS-550P
• Place the depth gauge tool firmly on guide
bar so that depth gauge protrudes.
Then file top of depth gauge with the flat file until
flat with top of the depth gauge tool.
- Be sure to round off the front edge of the
depth gauge.
Properly filed cutters are shown in illustration.
When setting of the chain is finished, soak it in oil
and wash away filings completely before using.
- When chain has been filed on the bar, supply
sufficient oil to it, rotate the chain slowly to wash
away the filings before using again.
- If the chain saw is operated with filings clogged
in the groove, the saw chain and the guide bar
will be damaged prematurely.
- If the saw chain becomes soiled with resin, for
instance, clean it with kerosene and soak in it oil.
NOTE
These angles are referred to as Oregon 20LPX,
20BPX or 72LPX, 72LGX.
To sharpen other follow chain manufacturer’s
instruction.
Remove until
flat with tool
Depth gauge tool
Round off
the edge
1/5
One fifth of file diameter remains
above cutter edge
Side plate angle
Top plate filing angle
Parallel
0.64 mm (0.025 in.)
Top plate cutting angle
Depth gauge
60°
20LPX, 20BPX: 85°
72LPX, 72LGX: 60°
20LPX, 20BPX: 30°
72LPX, 72LGX: 25°